/Engine/Plugins/Experimental/PCG/Source/PCG/Public/PCGSettings.h
Called after intialization to construct the list of all overridable params. In Editor, it will first gather all the overridable properties names and labels, based on their metadata. Can request a "reset" if something changed in the settings. And then, in Editor and Runtime, will gather the FProperty*.
void InitializeCachedOverridableParams ( bool bReset )